Difference between revisions of "DS18B20 1 - Wire Digital Thermometer Module"

From ITEAD Wiki
Jump to: navigation, search
(→‎Specifications)
(→‎AC electrical characteristics)
Line 57: Line 57:
  
 
==AC electrical characteristics==
 
==AC electrical characteristics==
 +
{| class="wikitable"
 +
|-
 +
| align="center" style="background:#f0f0f0;"|'''Parameter'''
 +
| align="center" style="background:#f0f0f0;"|'''Min.'''
 +
| align="center" style="background:#f0f0f0;"|'''Typical'''
 +
| align="center" style="background:#f0f0f0;"|'''Max.'''
 +
| align="center" style="background:#f0f0f0;"|'''Unit'''
 +
|-
 +
| Temperature conversion time tCONV  (9-bit accuracy)||-||-||93.75||ms
 +
|-
 +
| Temperature conversion time tCONV  (10-bit accuracy)||-||-||187.5||ms
 +
|-
 +
| Temperature conversion time tCONV (11-bit accuracy)||-||-||375||ms
 +
|-
 +
| Temperature conversion time tCONV (12-bit accuracy)||-||-||750||ms
 +
|-
 +
| Time for strong pullup on tSPON||-||-||10||us
 +
|-
 +
| Time slot tSLOT||60||-||120||us
 +
|-
 +
| Recovery time tREC||1||-||-||us
 +
|-
 +
| Write 0 low time tLOW0||60||-||120||us
 +
|-
 +
| Write 1 low time tLOW1||1||-||15||us
 +
|-
 +
| Read data valid tRDV||-||-||15||us
 +
|-
 +
| Reset time high tRSTH||480||-||-||us
 +
|-
 +
| Reset time low tRSTL||480||-||-||us
 +
|-
 +
| Presence-detect high tPDHIGH||15||-||60||us
 +
|-
 +
| Presence-detect low tPDLOW||60||-||240||us
 +
|-
 +
| Capacitance CIN/OUT||-||-||25||pF
 +
|}
  
 
==Instruction==
 
==Instruction==

Revision as of 02:20, 27 May 2014

Overview

Digital temperature sensor.jpg

DS18B20 is a single-bus digital temperature sensor with features of ultra-small size, wide range of applicable voltage and measurable temperature and high resolution, etc. , which can be applied to temperature control, industrial systems, consumer products, thermometers or any thermal measurement system.

Features

1. Plug and play, easy to use. Compatible with the mainstream 2.54 interfaces and 4-Pin Grove interfaces in the market. IM120710012_2.jpg

2. With use of M4 standard fixed holes, compatible with M4-standard kits such as Lego and Makeblock. im120710012-6.jpg

3. Rotatable detecting direction for better adaption. im120710012-7.jpg

Specifications

PCB size 33.2mm X 14.0mm X 1.6mm
Working voltage 3.3 or 5V DC
Operating voltage 3.3 or 5V DC
Measurable range -55~+125℃
Measurement resolution 9~12bits（programmable）
Compatible interfaces 2.54 3-pin interface and 4-pin Grove interface(1)

Note 1: S for digital input/output port, V and G for voltage at the common collector and ground respectively

DC electrical characteristics

Parameter Min. Typical Max. Unit
Working voltage 3 5 5.5 VDC
Working current（VCC=5V，T=25℃） - 1 1.5 mA
Sampling interval 1 - - s
Accuracy (-10~+85℃) - - ±0.5 ℃
Accuracy (-55~+125℃) - - ±2 ℃
Logic input low level VIL -0.3 - 0.8 V
Logic input high level VIH 2.2 - 5.5/VCC+0.3 V

AC electrical characteristics

Parameter Min. Typical Max. Unit
Temperature conversion time tCONV (9-bit accuracy) - - 93.75 ms
Temperature conversion time tCONV (10-bit accuracy) - - 187.5 ms
Temperature conversion time tCONV (11-bit accuracy) - - 375 ms
Temperature conversion time tCONV (12-bit accuracy) - - 750 ms
Time for strong pullup on tSPON - - 10 us
Time slot tSLOT 60 - 120 us
Recovery time tREC 1 - - us
Write 0 low time tLOW0 60 - 120 us
Write 1 low time tLOW1 1 - 15 us
Read data valid tRDV - - 15 us
Reset time high tRSTH 480 - - us
Reset time low tRSTL 480 - - us
Presence-detect high tPDHIGH 15 - 60 us
Presence-detect low tPDLOW 60 - 240 us
Capacitance CIN/OUT - - 25 pF

Instruction

Demo

Download

Useful Links

Retrieved from "https://wiki.iteadstudio.com/index.php?title=DS18B20_1_-_Wire_Digital_Thermometer_Module&oldid=1079"